The receiving duo of Larry Fitzgerald and Anquan Boldin presents one of the toughest challenges for defensive backs in the NFL, but if Sunday’s game against Arizona comes down to Seattle’s cornerbacks shutting those two down, well, let’s just say it could be a long day for the Seahawks.

Instead, the Seahawks’ best chance at slowing the prolific Cardinals passing game will be their ability to pressure quarterback Kurt Warner.

“That’s a major thing,” said defensive end Darryl Tapp. “It’s all going to start up front.”

Both Fitzgerald and Boldin present matchup problems for the Seahawks, and if it comes down to Warner throwing the ball up for grabs down field, they’ll win those battles more often than not. Fitzgerald and Boldin combined for 23 catches and 337 yards in last season’s win in Seattle, and that was with Marcus Trufant playing for Seattle.

“He has great hands,” cornerback Kelly Jennings said of Fitzgerald. “If it’s near him and he can get his hands to it, there’s a great chance he’s going to catch it.”

Which brings it back to the D-line. In Arizona’s two wins this season, Warner has been sacked once, has not throw an interception and had quarterback ratings of 131.2 and 109.8. In the Cardinals’ two losses, he was sacked seven times, threw four interceptions and had ratings of 67.2 and 67.1.

“We’ve got to get to him,” Seahawks defensive coordinator Gus Bradley said. “We talked about being an aggressive defense from the start, and that’s not always just blitzing. You saw that last week, we got four-man pressure, and we need to do that this week.

“However you do it, you’ve just got to get him to feel like you’re getting heat on him, and hopefully he’ll make a bad decision. He hasn’t made too many, but hopefully on Sunday he does.”

The good news for Seattle is that the line has been one of the bright spots on defense. Second-year pro Lawrence Jackson has been the most consistent pass rusher and leads the team with four sacks, while the Seahawks are tied for fourth in the NFL with 14 sacks.

And the Seahawks have gotten the job done with depth. Tapp started in place of an injured Patrick Kerney against Jacksonville last weekend, and finished with two tackles for loss, a sack and four hits on the quarterback. Even Nick Reed, the team’s fifth defensive end, had a sack and a memorable 79-yard touchdown on a fumble return.

“We knew back in minicamps and training camp that we had a team full of playmakers,” Tapp said. “So it felt really good to see everybody stepping up and making plays this past game, so we’ll try to continue that.”

With Kerney expected back this week, the Seahawks will have plenty of options on the defensive line.

“If you can have eight defensive linemen that you can roll through there and get each of them 35 or 40 reps in a game, then they’re all going to stay fresh and they’re all going to stay effective,” Seahawks coach Jim Mora said. “It’s a great situation for us that we feel like we have guys that can go in and play and not see the level of play decline.”